php wireless classification

A PHP wireless classification method that was used a long time ago, using a recursive idea, is shared with everyone here

//$data is the classification data taken out from the database, $pid is the upper-level classification id, and $level is the classification. Level, here it is limited to level 10, $keyword is the category name

function genCate($data, $pid =0, $level = 0,$keyword)
{
if($level ==10)break;
$l        = str_repeat("    ", $level);
$l        = $l.'└';
static $arrcat  = array();
$arrcat   =empty($level) ? array() :$arrcat;
foreach($data as $k => $row)
	{
	if($row['pid']==$pid)
		{
		$row[$keyword]  = $l.$row[$keyword];
		$row['level']   =$level;
		$arrcat[]     = $row;
		genCate($data,$row['id'], $level+1,$keyword);
		}
	}
	return $arrcat;
}

The above introduces the PHP wireless classification, including aspects of the content. I hope it will be helpful to friends who are interested in PHP tutorials.